Swing training device



FIG. 1 is a perspective view of a swing training device showing my new design;

FIG. 2 a front elevation view thereof, the rear elevation view being the same thereof;

FIG. 3 is a left side elevation view thereof, the right side elevation view being the same thereof;

FIG. 4 is a top plan view thereof; and,

FIG. 5 is a bottom plan view thereof.

The broken line showing is included for the purpose of illustrating and forms no part of the claimed design. 

CLAIM The ornamental design for a swing training device, as shown and described. 